Abstract: For use with an electrolytic cell having multiple suspended anodes, an anode positioning system including an individual screw jack for raising and lowering each anode, an individual reduction gear box for driving each screw jack, an individual slipping frictional clutch connected to the input shaft of each gear box, and a motor for bidirectionally driving the gear boxes through the clutches. The motor is connected to the clutches through a transmission selectively operable to drive all the gear boxes in the same direction, or to simultaneously drive some of the gear boxes in one direction and others in the opposite direction so that some anodes are raised as others are lowered thereby to "pump" the cell by agitating the electrolyte.